if not i think with my poor skills i can not do this, but i see that each Post has a unique div ID so with a var content = document.getElementById('wall-item-body-178052'); and send this to maybe to google translate (if api key is required it maybe can added to a app-config part with a little explanation how to create one) the text could be translated on the fly.For this there should be a entry in the Gear Button in each post

There are hooks in the code to allow an addon to do this automatically - but no addon has been written for it (yet). My personal preference would be for a non-Google service, but so far I haven't found one.

This likely won't get tackled unless someone else is motivated to contribute to make it happen. I'm certainly willing to provide pointers, guidance and suggestions, but simply cannot take it on as a project myself in the forseeable future.